Which one is oled

Wait till you hear about Micro RGB for gaming monitors
Micro RGB: It's literally the holy grail for PC setups: you get the infinite contrast and true blacks of an OLED, but with the high peak brightness and durability of an LED.
The big deal for PC users is the zero burn-in risk. Standard OLEDs use organic chemicals, so leaving a game HUD, windows taskbar, or static discord UI on the screen for hours will eventually ruin it. Micro RGB uses inorganic crystals instead meaning you can just feed it more power to jack up the HDR brightness safely, and you never have to baby the screen or worry about desktop burn-in.